What does the associative property state

Solve for x i'll try to attach the files bc it's not letting me for some reason

Find the value of the variable and the length of each secant segment.

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.